PokerSolver
PokerSolver/5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/SB vs BB 4-bet 20.7bb

SB vs BB 4-bet 20.7bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 100bb · SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb · Small blind to act

5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 30.5bbYour cards?
9bb
20.7bb

Tap your two cards.

Small blind's range

584 of 1,326 combos get here
Fold 71.8%Call 14.4%All-in 99.84bb 13.8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the small blind (SB) when SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 100bb?

SB limps, BB isolates to 3bb, SB 3-bets to 9bb, BB 4-bets to 20.7bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 100bb: the small blind (SB) folds 71.8%, calls 14.4% and goes all-in 99.84bb 13.8%. Always call: 55, ATs, KTs+, QTs+, T9s, 87s. Always all-in 99.84bb: JJ+, 99, AKs, A3s-A5s, AKo. Mixed: TT, 88, 66, AJs-AQs, A6s-A8s, A2s, 98s, 76s, 65s, 54s, AQo.

Always fold
K2s-K9s, Q7s-Q9s, Q5s, Q3s, J7s-J9s, T7s-T8s, T5s, 95s-96s, 85s-86s, 75s, 64s, ATo-AJo, A5o-A7o, A2o, K8o+, Q9o+, J8o+, T8o+, 98o, 76o
Always call
55, ATs, KTs+, QTs+, T9s, 87s
Always all-in 99.84bb
JJ+, 99, AKs, A3s-A5s, AKo
Mixed
TT, 88, 66, AJs-AQs, A6s-A8s, A2s, 98s, 76s, 65s, 54s, AQo
Settings: 5-max · 100bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 100bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 23.9). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.